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&G Guard tone Selection
Commands:
&G0, &G1, &G2
\G
When the modem operates according to V.22 or V.22 bis-
standard, it may happen that the carrier is interpreted as
signalling in the telephone network. To prevent this, the modem
can send a guard tone, as a signal to public exchanges
indicating data transmission via modem is in progress.
Line Flow Control
Commands: \GO, \G1, \G2
This command specifies the flow control used on data to/from
the remote modem. This flow control can be set independent of
the local flow contro! towards the DTE because data can be
buffered in the modem. Line flow control uses XON/XOFF
protocol and is only active in normal mode (\NO).
AT\G2p*9|
.
Unidirectional line flow control. The modem
. ] sends XON/XOFF,
bul ignores received
XON/XOFF.
(Treated as data).
"" ine flow control should not be used when there may be
XON/XOFF characters in the data stream (ex. binary
files).
Other related commands: \Q and \X.
Read more in chapter 8 «Flowcontrol and buffering»
%G Line speed locking
Commands: %G0, %G1
AT%GO git:
The line speed (+S6) will be updated by
2°
'
5 , command line prefix (AT).
:
s~
The line speed (+S6) will be updated by the
AT%G1
. al
°%B command or by writing to the register +S6
:
only. This command may be used if the DTE
speed is independent of the line speed (+C 1 ) ,
and the line speed should be changed.
3-20
LZTR104006 R1.00
Zat 14.4/14.4-7 and Zat 19.2/19.2-7
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